Additional changelog update (AcademySoftwareFoundation#2501)

Author: jstone-lucasfilm

CHANGELOG.md

@@ -45,7 +45,7 @@
 
 ### Removed
 - Removed the legacy [MATERIALX_OIIO_DIR](https://github.com/AcademySoftwareFoundation/MaterialX/pull/2342) option, as it connected to a CMake pathway that is no longer present in OIIO 2.2 and later.
-- Removed implementations of the [blur node](https://github.com/AcademySoftwareFoundation/MaterialX/pull/2411) in all shader generators, with the goal of reevaluating its design in a future specification update.
+- Removed [implementations](https://github.com/AcademySoftwareFoundation/MaterialX/pull/2411) and [helper functions](https://github.com/AcademySoftwareFoundation/MaterialX/pull/2498) for the blur node in shader generation, with the goal of reevaluating its design in a future specification update.
 
 ## [1.39.3] - 2025-03-07